Leftover barbacoa and cauliflower rice from earlier in the week make an easy filling for baked stuffed peppers. Smarts: Test the peppers towards the end of the suggested cook time to be sure they are done to your liking. We find that some people prefer their peppers to be super tender and others prefer that they still have a bit of crunch.
Cauliflower rice - (Skip if cauliflower rice was made ahead for Monday; if prepping right before cooking, get oven heating first.) Pulse florets in a food processor until broken up into ‘rice’-sized bits. Cook rice in one of two ways: 1) Microwave for 4 to 5 minutes and then fold in butter. Season with some salt and pepper; or 2) Heat a pan over medium-high heat and add butter. Saute cauliflower in heated butter for ~5 minutes, until tender but still crunchy. Season to taste with some salt and pepper. Watch this video for the full how-to on cauliflower rice. (Can be done up to 5 days ahead)
Peppers / Zucchini / Onions / Coleslaw mix - Prep as directed. Store peppers in one container. Store zucchini in another container. Combine onions and coleslaw mix. (The coleslaw mix will be easier to stuff in the peppers if it’s in smaller pieces.) (Can be done 5 days ahead)
Barbacoa - If beef is in large pieces, roughly chop into smaller pieces. This will make it easier to fold into the pepper filling. (Can be done 3 days ahead)
Arrange peppers in a single layer, cut-side up in a large baking dish (use two if needed).
Heat a large skillet or wok with oil over medium-high heat. Add zucchini and saute until zucchini is very tender and golden brown, ~5 minutes. Add onions and coleslaw mix and saute until tender, 3 to 4 minutes. Add cumin, and a pinch of salt. Saute for 1 minute more.
Pour tomatoes (including liquid) and adobo sauce over vegetables and simmer until liquid reduces, ~2 minutes.
Remove from heat and stir in cauliflower rice and barbacoa.
Press barbacoa filling into peppers, mounding it over top if needed. (Since peppers vary in size, you may have some filling leftover. Just leave the extra filling out and serve it alongside the peppers.)
Pour water into the baking dish.
Cover peppers tightly with foil. Bake, covered, until peppers soften, 25 to 30 minutes.
Remove foil and return peppers to the oven. Bake, uncovered, until peppers are golden brown on top. ~5 minutes more.
Serve peppers with pepitas and cilantro on top. Enjoy!